hello A Beepster,
the formula you are using will display the value for the first group if the cross-tab is at the beginning of the report. when you're using crosstabs, you have to use the crosstab specific functions in order to find the value at the current row / column index or intersection.
to fix this, right click on one the cells for AvgFare and choose Format Field > Common tab > Display String...insert this...
if GridValueAt (currentrowindex, currentcolumnindex, currentsummaryindex -2) <> 0
then
totext(GridValueAt (currentrowindex, currentcolumnindex, currentsummaryindex -1)/GridValueAt (currentrowindex, currentcolumnindex, currentsummaryindex -2))
this is assuming that you're using cr 2008 or higher as you didn't specify which version you're using. these functions were new for cr 2008.
-jamie